diff --git a/TODO.md b/TODO.md
index 47a1183..9f5430b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -9,3 +9,5 @@
 [ ] do we fucking need keysymbol?
 	[ ] new_symbol_tokens() and new_char_tokens() are confusing
 [ ] figure out how to allow regex engine overridding
+[ ] clean up render\_string()
+[ ] optimize render string by skipping match\_t-s known to be before the cursor